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Browse Topic Dictionaries
Build your topic vocabulary with these mini-dictionaries, which are groups of words related to common subject areas.
Choose a topic area from the list below to get started.
Categories Home
/
Science
/
The Natural Sciences
/
Energy And Physical Forces
Categories Home
Science
Engineering
Devices
How machines work
Materials and properties
Structures
Mathematics
Mathematical terminology
Types of mathematics
The natural sciences
Cell biology
Electronics
Energy and physical forces
Experiments and research
Genetic engineering
Molecules and matter
absorb
acceleration
alpha radiation
amplitude
electromagnetic
electromagnetism
emission
emit
energy
entropy
fissile
fission
force
frequency
friction
fundamental force
fusion
gamma radiation
gravitational
gravity
heat
induction
inertia
infrared
interference
kinetic
light
lighting
magnetic
magnetism
mechanic
mechanical
microwave
momentum
nuclear
nuclear energy
nuclear physics
photon
potential energy
radiate
radiation
radioactive
ray
reactor
reflect
refract
refractive index
spectrum
strong force
ultraviolet
vector
velocity
wave
wavelength
weak force